Crime Stopper REVO4 data Remote Start and Keyless Entry System with Trunk Pop Designed to work exclusively with a data interface module &#40;Fortin or ADS&#41; through the vehicles Includes 1-Way decoder antenna to communicate to data module. Uses &#40;2&#41; five-button transmitters to operate 1500 ft. operating range. Programmable engine sensing modes&#58; Tachometer &#40;RPM&#41;&#44; Tachless &#40;Voltage&#41; or Hybrid